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| Number | Title | Issue Date |
| 8102885 | All-fiber mode selection technique for multicore fiber laser devices An optical device that includes 1) a gain section having a plurality of core regions including dopant species configured to absorb incident radiation at a first wavelength and emit radiation at a second wavelength, and 2) at least one passive section attached to the... | 01/24/2012 |
| 8081667 | Single-mode high power multimode fiber laser system A high power single mode fiber laser system is configured with an active fiber including coextending multimode core (MM) and cladding around the MM core. The MM core is doped with one or more ions selected from rare earth and transitional metals and has a bottleneck... | 12/20/2011 |
| 8077747 | Phosphate glass based optical device and method An optical device includes an optical fiber having a core including multicomponent phosphate glasses, and a cladding surrounding the core, and a first fiber Bragg grating formed in a first portion of the core of the optical fiber and having an index modulation ampli... | 12/13/2011 |
| 8077748 | Hybrid waveguide laser with a fiber gain medium A laser includes a gain stage and a pump stage. The gain stage includes a fiber link that terminates at a pair of ends and includes a doped fiber. The pump stage includes a glass volume, the glass volume having a pair of fiber interface ports at which the pair of en... | 12/13/2011 |
| 8073019 | 810 nm ultra-short pulsed fiber laser Methods and systems for generating ultra-short fiber laser pulses are disclosed, including generating a signal laser pulse from a seed fiber laser; using a pulse stretcher comprising an input and an output, wherein the signal laser pulse is coupled into the input of... | 12/06/2011 |
| 8073018 | Laser pulse generating apparatus and method Jitter and waveform are improved by reducing the wavelength spectrum width of a laser beam pulse. In a laser pulse generating apparatus according to the present invention, a semiconductor laser device, a polarization maintaining optical fiber, an optical reflection ... | 12/06/2011 |
| 8068520 | Method for generating a laser pulse for the fine machining of workpieces using a fiber laser Method for generating a laser pulse for the fine machining of workpieces using a fiber laser, the laser fiber of which is optically pumped by use of at least one diode laser which is operated by a current pulse whose slew rate, pulse height, and pulse length are adj... | 11/29/2011 |
| 8040925 | Broadband fiber laser A broadband fiber laser provides a lasing cavity including a reflective minor and at least one fiber Bragg grating for further providing a lasing signal to resonate and be amplified therein. Alternatively, the wavelength of the fiber laser can be either fixed or tun... | 10/18/2011 |
| 8040927 | Ring or linear cavity of all-fiber-based ultra short pulse laser system and method of operating the same A ring-cavity or linear-cavity all-fiber-based ultra short pulse laser system and method of operating the same are provided. The all-fiber-based ultra short pulse laser system includes a pulse pump light source, a gain fiber, a first fiber signal pump combining unit... | 10/18/2011 |
| 8040926 | Multi-core fiber for optical pumping device and manufacturing method thereof, optical pumping device, fiber laser and fiber amplifier A multi-core fiber for an optical pumping device is provided. The multi-core fiber includes a plurality of optical fibers that are inserted into holes of an alignment member. The optical fibers and the alignment member are integrated by heating. The alignment member... | 10/18/2011 |
| 8014426 | Optical device and method of controlling a refractive index profile in the optical device An optical device includes an optical material comprising active dopant ions and absorber dopant ions spaced apart from the active dopant ions. The active dopant ions are provided to absorb a first radiation and convert a portion of the first radiation into sensible... | 09/06/2011 |
| 8009706 | Fiber laser light source A fiber laser light source is provided with a laser resonator including a pair of fiber gratings optically connected to a fiber in a state that the fiber is interposed between the paired fiber gratings. The reflection center wavelength of a laser-exit side fiber gra... | 08/30/2011 |
| 8009705 | Fiber MOPA system without stimulated brillouin scattering Methods and systems for increasing the threshold for stimulated Brillouin scattering are described. A seed source may generate one or more chirped seed pulses characterized by a pulse duration τ, and a frequency chirp. The pulse duration τ may be greater than abou... | 08/30/2011 |
| 7983312 | Method and apparatus for generation and amplification of light in a semi-guiding high aspect ratio core fiber A planar laser gain medium and laser system. The novel laser gain medium includes an active core having a high aspect ratio cross-section with a fast-axis dimension and a slow-axis dimension, signal claddings adapted to form reflective boundaries at fast-axis bounda... | 07/19/2011 |
| 7983313 | System and method for coupling multiple beams to an active fiber A system and a method for coupling multiple pump light beams to an active fiber. The system including an inverted conical disk, concave lens or glass wedge, an active fiber placed in a center of the inverted conical disk (or concave lens) or at a bottom facet of the... | 07/19/2011 |
| 7974318 | Infra-red multi-wavelength laser source The present invention relates in particular to the field of lasers and in particular to a laser source having a neodymium-doped crystal (2; 23) or fiber and pumpable by pumping means (3; 25) and a non-linear Raman effect converter stimulated in methane... | 07/05/2011 |
| 7974319 | Spectrally tailored pulsed fiber laser oscillator High power optical pulses generating methods and laser oscillators are provided. A light generating module generates seed optical pulses having predetermined optical characteristics. A spectrum tailoring module is then used to tailor the spectral profile of the opti... | 07/05/2011 |
| 7970022 | Surface-emitting fiber laser In one aspect, the disclosure features an article, including a fiber waveguide extending along a waveguide axis, the fiber waveguide including a core extending along the waveguide axis and a confinement region surrounding the core. The confinement region is configur... | 06/28/2011 |
| 7970023 | Fiber laser arrangement having a high beaming power A fiber laser arrangement having a high beaming power includes a plurality of continuously operating coherent individual fiber lasers. Pumping energy generated by a common master oscillator operated in the longitudinal mode is distributed to the fiber lasers by way ... | 06/28/2011 |
| 7957432 | Light coupler and fiber laser system including the same A light coupler emitting a high power laser with a high beam quality and a fiber laser system including the light coupler is disclosed. The light coupler includes a first optical fiber bundle comprising a plurality of first optical fibers having either a single-mode... | 06/07/2011 |
| 7957431 | Not temperature stabilized pulsed laser diode and all fibre power amplifier A laser system has an output/input coupler unit (49) with a circulator (37). An output of the circulator (37) is operationally connected to a detector unit (43). The input/output (EA37) of the circulator is operationally connec... | 06/07/2011 |
| 7957433 | Mode-locked two micron fiber lasers A mode-locked fiber laser comprising a multicomponent glass fiber doped with a trivalent rare-earth ion of thulium and/or holmium. ... | 06/07/2011 |
| 7953126 | Fiber laser processing method and fiber laser processing apparatus A fiber laser processing apparatus controls a LD drive current ILD in a power feedback control mode (FIG. 3E) such that output of a fiber laser beam FB rises substantially from zero or a value around zero to a preceding level having no substantial ... | 05/31/2011 |
| 7944954 | Laser apparatus with all optical-fiber A laser apparatus with all optical-fiber includes a plurality of pumping light sources in different wave bands and an optical-fiber laser system. The optical-fiber laser system includes an optical fiber at least doped with erbium (Er) element and doped with or not d... | 05/17/2011 |
| 7940816 | Figure eight fiber laser for ultrashort pulse generation A polarization-maintaining figure eight (PMFE) fiber laser is configured to generate ultrashort (femtosecond) output pulses by intentionally inserting asymmetry (in the form of a phase bias) into the bi-directional loop of the fiber laser. The introduction of asymme... | 05/10/2011 |
| 7940815 | Fluorescent glass, optical waveguide, optical fiber, optical coherence tomography apparatus, and optical fiber laser The present invention relates to fluorescent glass which is easily put into practical use, and optical elements including the same. In one aspect, the fluorescent glass is comprised of silica-based glass containing Bi as a dopant, and adapted to generate fluorescenc... | 05/10/2011 |
| 7936796 | Apparatus for providing optical radiation In one embodiment, a photo-darkening resistant optical fiber includes a waveguide having a numerical aperture less than 0.15. The waveguide includes a core having a refractive index n1 and a pedestal having a refractive index n2, and wherein the fiber ... | 05/03/2011 |
| 7924892 | Fiber amplifier based light source for semiconductor inspection A laser illuminator for use in an inspection system, such as a semiconductor wafer inspection system or photomask inspection system is provided. The gain medium in the illuminator comprises optical fiber, and amplification, beam splitting, frequency and/or bandwidth... | 04/12/2011 |
| 7920605 | All-fiber color laser and light-illuminating method thereof An all-fiber color laser and a light-illuminating method thereof are disclosed. The steps of the light-illuminating method include: providing a fiber color laser having a pump light source and an optical fiber with a multi-level wavelength gain medium, a first grati... | 04/05/2011 |
| 7912099 | Method and apparatus for preventing distortion of powerful fiber-laser systems by backreflected signals A powerful fiber laser system is configured with at least one filtering element capable of preventing a backreflected Raman component of the main signal from propagating along the upstream stretch of the system. The filtering element includes a slanted fiber grating... | 03/22/2011 |
| 7912100 | Femtosecond laser processing system with process parameters, controls and feedback A femtosecond laser based laser processing system having a femtosecond laser, frequency conversion optics, beam manipulation optics, target motion control, processing chamber, diagnostic systems and system control modules. The femtosecond laser based laser processin... | 03/22/2011 |
| 7903696 | High-power narrowed-linewidth fiber laser system A high-power narrow-linewidth fiber laser system includes a seed oscillator with multiple resonant cavities and an amplifier stage. The seed oscillator includes a gain fiber, a pump source to introduce pump light into the gain fiber, a single-mode output fiber arran... | 03/08/2011 |
| 7903697 | Method and system for tunable pulsed laser source A tunable pulsed laser includes a seed source and an optical circulator. The optical circulator includes at least a first port coupled to the seed source, a second port, and a third port. The laser also includes an amplitude modulator characterized by a first optica... | 03/08/2011 |
| 7903695 | Optical fiber laser and exciting method using same An optical fiber laser, according to the present invention, has an optical fiber including a core to which a rare earth element is added and a clad disposed around the core, and also has an excitation light source for emitting excitation light incident on a side of ... | 03/08/2011 |
| 7889767 | Self-coherent combining technique for high power laser implementation and method An optical arrangement comprising first and second guided structures for providing first and second beams of electromagnetic energy and a node for coherently combining said first and second beams in free space, that is, with an unguided structure. In the illustrativ... | 02/15/2011 |
| 7881347 | Hybrid gain guiding in laser resonators Methods and systems for hybrid gain guiding in laser resonators that combines the features of gain guiding and fiber or other types of lasers into a single system. Hybrid gain guiding in laser resonators is not limited to conventional fiber lasers. Any type of gain ... | 02/01/2011 |
| 7864820 | Laser light source device A laser light source device is disclosed, which reduces the coherence of the laser light and inexpensively achieves a visually recognizable level of speckle reduction without use of a mechanical driving means. The laser light source device includes: laser modules, e... | 01/04/2011 |
| 7848368 | Fiber laser system A powerful fiber laser system is configured with at least one large-area multi-clad rare-earth doped fiber, which is configured with a MM core capable of propagating a single mode laser emission at a first wavelength, and with at least one pumping assembly capable o... | 12/07/2010 |
| 7843975 | High-power fiber optic pulsed laser device The invention relates to a high-power fiberoptic laser device comprising at least one laser diode (1) capable of transmitting a pump wave, a triggered optical resonator (22) consisting of a first double-sheathed optical fiber (6), an optical amp... | 11/30/2010 |
| 7839901 | High power fiber laser system with cladding light stripper A powerful fiber laser system is configured with at least one gain block. The gain block includes an input fiber guiding a pump light, a multiclad active fiber receiving the pump light so that a major portion is absorbed in the core of the active fiber while a minor... | 11/23/2010 |
